Cartoon Brew has tipped me off to the upcoming documentary I Know That Voice which focuses on voice over actors, from the guys who narrate trailers and commercials, to the people behind the voices of nearly all of the classic and contemporary cartoon characters, to even the voices behind your favorite characters in video games. The doc seems to be heavily interview-driven, so a lot of talking heads against clips. While I usually prefer a narrative when it comes to non fiction films, this subject is interesting enough and I’d love to her the stories of all these voice-over greats. Watch the trailer embedded after the jump.